Zipper



FIG. 1 is a top plan view of a zipper showing my new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a right elevation view thereof, the opposite side being a mirror image of the shown;

FIG. 4 is a front elevation view thereof, the opposite end being a mirror image of the shown; and,

FIG. 5 is an isometric view thereof.

The broken lines in the drawings depict environmental subject matter only and form no part of the claimed design. 

The ornamental design for a zipper, as shown and described. 